Celebrity Jeweller Calls On Music Stars To Testify.A string of high-profile music stars including SEAN 'DIDDY' COMBS, MARIAH CAREY and SHAWN 'JAY-Z' CARTER could be hauled before a US court to testify on behalf of their jeweller.Jeweller to the stars JACOB ARABOV is accused of accepting cash for jewellery from the members of the Black Mafia Family (BMF) - a Detroit-based drug ring that moved millions of dollars in narcotics - and then failing to file the proper tax forms in a bid to conceal the illegal source of the money.PageSix.com reports the music stars, as well as England soccer hero DAVID BECKHAM, are named by Arabov in a sealed submission to a US judge in Detroit, Michigan as defence witnesses.His attorney BENJAMIN BRAFMAN refuses to confirm the showbiz list but insists some clients will be called upon to testify about his good character and how "they themselves made substantial purchases in cash from Mr Arabov and all the money was handled properly".